王晓, 薛玉君, 程波,等.矿石破碎颗粒黏结模型黏结键特征及表征[J].河南理工大学学报（自然科学版）,doi:10.16186/j.cnki.1673-9787.2022020007

WANG X , XUE Y J, CHENG B,et al.The characteristics and representation of bond key in bonded particle model forore crushing[J].Journal of Henan Polytechnic University(Natural Science) ,doi:10.16186/j.cnki.1673-9787.2022020007

矿石破碎颗粒黏结模型黏结键特征及表征(网络首发)

王晓1,2, 薛玉君1,2, 程波3,4, 刘俊3,4, 李济顺1,2

1.河南科技大学 机电工程学院，河南 洛阳  471003;2.河南省机械设计及传动系统重点实验室（河南科技大学），河南 洛阳  471003;3.洛阳矿山 机械工程设计研究院有限责任公司，河南 洛阳  471003;4.矿山重型装备国家重点实验室（中信重工机械股份有限公司），河南 洛阳  471003

摘要:针对矿石颗粒黏结模型与实际矿石破碎特性间差异造成的仿真不准确问题，依据矿石强度尺寸效应 理论，重点研究不同粒级矿石颗粒黏结模型中黏结键特征，设计铜矿石颗粒黏结模型中基础颗粒间的黏结 键参数，应用离散元方法对30，40，60 mm 3种粒级铜矿石矿样进行落重试验和破碎仿真，给出黏结键等 效临界变形的概念，讨论矿石落重试验t₁₀和冲击能量的关系，探讨黏结键参数变化规律。结果表明：3种 粒级铜矿石颗粒黏结模型破碎仿真与落重试验粒级质量分数的平均误差分别为1.75%，1.66%，1.84%，试 验和仿真得到的破碎粒度质量分数具有很好的一致性；法向和切向等效临界变形可以表征黏结键强度，单 位冲击能量下落重试验的的 t_n10可以表征矿石强度；利用黏结键等效临界变形和t_n10的对应关系确定黏结键参 数，提高了矿石颗粒黏结模型的建模效率和仿真精度。

关键词:颗粒黏结模型;黏结键;等效临界变形;离散元;矿石破碎

中图分类号：TD921.4

doi:10.16186/j.cnki.1673-9787.2022020007

基金项目:国家重点基础研究发展规划项目（2012CB724306）；郑洛新国家自创区创新引领型产业集群专项项目（201200210500）

收稿日期:2020-02-22

修回日期:2022-03-16

网络首发日期:2022-05-25

The characteristics and representation of bond key in bonded particle model forore crushing（Online）

WANG Xiao1,2, XUE Yujun1,2, CHENG Bo3,4, LIU Jun3,4, LI Jishun1,2

1.School of Mechatronics Engineering，Henan University of Science and Technology，Luoyang  471003，Henan，China;2.School of Mechatronics Engineering，Henan University of Science and Technology，Henan Key Laboratory for Machinery Design and Transmission System，Henan University of Science and Technology，Luoyang  471003，Henan，china;3.Luoyang Mining Machinery Engineering Design Institute Co.，Ltd.，Luoyang  471003，Henan，China;4.State Key Laboratory of Mining Heavy Equipment，CITIC Heavy Industries Co.，Ltd.， Luoyang  471003， Henan，China

Abstract:Aiming to the inaccuracy of simulation owing to the difference between the ore bonded particle model and the actual ore crushing feature， the characteristics of bond key in the bonded particle model of different size were emphasized. According to the theory of ore strength size effect， the bond parameters between basic particles in the bonded particle model of copper ore were designed. As for three sizes of copper ore samples including 60 mm， 40 mm and 30 mm， the drop weight test and crushing simulation by discrete element method were carried out. The concept of equivalent critical deformation of bond was given. The relationship between t₁₀ from drop weight test and impact energy was discussed. The variation rule of bond parameters was explored. The results show that the average errors of mass percentage from crushing simulation and drop weight test of three kinds of size copper ore are 1.75%， 1.66% and 1.84%， respectively. The crushing mass percentage obtained by test and simulation are in good agreement. The bond strength can be characterized by normal and shear equivalent critical deformation. The t_n10 of unit impact energy from drop weight test can characterize the ore strength. The bond parameters are determined by the corresponding relationship between the equivalent critical deformation of the bond and the t_n10， which improves the modeling efficiency and simulation accuracy of the ore bonded particle model.

Key words:bonded particle model;bond key;equivalent critical deformation;discrete element method;crushing

CLC：TD921.4